SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03b93d1ea5efdaf42ced2656978bce4c5b067b86b2a0f7da13f5e089543c2455' 
  AND token = 'xx7yIsrlOqarLfLW5BEvg6CUw/hYOW6ZtB39SVDKiic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}